Daily Dose / Aug 5, 2026 / The Night Sky

The Vanishing Night

Artificial light is erasing the stars faster than almost anyone realizes. Around the world, the glow of our cities is climbing into the sky — and the darkness that every human generation before us took for granted is slipping out of view.

9.6%

The night sky grows brighter by ~9.6% every year. At that pace the visible stars overhead halve roughly every eight years — a child born under 250 stars would see about 100 by the time they turn 18.

The Bortle Scale · how dark is dark

From 7,500 stars to almost none

Astronomers rate a sky from Class 1 (pristine wilderness) to Class 9 (the heart of a city). The number of stars a healthy naked eye can catch collapses across that span — most people alive today have never stood under anything better than Class 5.

← Pristine / true dark Inner-city sky →

The trend · Globe at Night, 2011–2022

The stars are going out on a timer

Stars visible to the naked eye at a fixed site

Modeled from a 9.6%/yr rise in sky brightness · indexed to 250 stars in 2011

80%

of North Americans can no longer see the Milky Way from where they live.

⅓

of all humanity — and 60% of Europeans — have lost the Milky Way entirely.

99%

of people in the U.S. and Europe live under a light-polluted sky.

Who has lost the Milky Way

A galaxy, hidden in plain sight

Share of the population that can no longer see our own galaxy overhead on a clear night, by region.

The bill we didn't mean to run up

Wasted light isn't free

At least a third of outdoor lighting shines sideways or straight up — lighting nothing but the sky. That waste has a price in money, carbon, and lives.

💸

$3.3B

wasted every year in the U.S. alone lighting the underside of the sky.

🐦

~1B

migratory birds die each year in the U.S., many drawn off course and into lit buildings.

🐢

21M

tons of CO₂ released annually to power light that never reaches the ground.

The good news

Light pollution is the only kind you can switch off

Unlike carbon or plastic, the sky heals the instant the lights go right. Four fixes recover most of the darkness.

Shield it

Point light down. Full-cutoff fixtures keep glow out of the sky.

Warm it

Use ≤3000K warm bulbs; blue-white light scatters farthest.

Dim it

Only as bright as the task needs — more lumens ≠ more safety.

Time it

Motion sensors and curfews. Dark when no one's looking.